PHP | Ds\Set clear() Function

The Ds\Set::clear() function is an inbuilt function in PHP which is used to remove all values from the set.

Syntax:

void public Ds\Set::clear( void )

Parameters: This function does not accept any parameter.

Return value: This function does not return any value.

Below programs illustrate the Ds\Set::clear() function in PHP:

Program 1:

<?php

// Declare new Set
$set = new \Ds\Set([1, 2, 3, 4, 5, 6]);

// Display the Set element
print_r($set);

// Use clear() function to remove elements
$set->clear();

// Display the Set element
print_r($set);

?>

Output:

Ds\Set Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)
Ds\Set Object
(
)

Program 2:

<?php

// Declare new Set
$set = new \Ds\Set([10, 15, 21, 13, 16, 18]);

// Display the Set element
var_dump($set);

// Use clear() function to remove elements
$set->clear();

// Display the Set element
var_dump($set);

?>

Output:

object(Ds\Set)#1 (6) {
  [0]=>
  int(10)
  [1]=>
  int(15)
  [2]=>
  int(21)
  [3]=>
  int(13)
  [4]=>
  int(16)
  [5]=>
  int(18)
}
object(Ds\Set)#1 (0) {
}

Reference: http://php.net/manual/en/ds-set.clear.php